I'm set up for that right now, sort of.
I have a firewire mixer with 4 XLR inputs and 4 stereo 1/4" inputs.
I'm using the XLR inputs for:
snare top
snare bottom
overhead left
overhead right
my kick and two toms are triggered. they are all muffled with some foam I cut up to fit around the inside of the drum for accurate triggering. it's difficult to trigger an unmuffled drum, as the vibrations go across the head, back and forth, around and around, often causing the trigger to fire multiple times on one hit.
so anyway, my trigger module, an alesis dm5 has 4 outputs, so I can set each of my 3 triggered drums to a different output, and record everything multitracked. this will all go into reaper, where I will replace the triggered drum sounds with samples from Superior Drummer.
I could have triggered the snare as well, but I built the snare myself and am quite attached to it, and feel it deserves to be recorded.